"From the white goat a letter arrived
The black goat, without reading it, ate it upItas for nothing, the writing of that letter
But he needed to know, so he wrote a letter back:
What was in that letter?"

In the second verse of the song, the colors of the sender and the consumer are reversed.

Following the recent amusing/embarrassing pettiness over the delivery or non-delivery of letters of protest between the governments of this blessed land and South Korea (Part I and Part II) the Tokyo Shimbun yesterday printed a new version of the song on a cartoon featuring the visages of the two national leaders.

"From the [blank] goat a letter arrived
The [blank] goat, without reading it, coughed it upIt was for nothing that that letter was thrown away
But he needed to know, so he picked the letter up:
What was in that letter?"

Here is the image of the editorial cartoon:

Yes, the two goats in the image are both white. Hence the title, on the left:

"You fill in with color the one you think is black, OK?"

Image courtesy: Tokyo Shimbun

Later - Many thanks to the reader Jordan, for catching the howling kanji error.